The MG124C and MG124CX both have a total of 12 input channels – four mono microphone/line inputs and four stereo line inputs. Two of the stereo line inputs can also function as mono microphone inputs, giving you up to six simultaneous mono microphone inputs when needed. Gain trim covers a wide -60dB ~ -16dB range for microphone input, and -34dB ~ +10dB for line input.